The crew behind the "milk or sugar" website (look here why this name) is ILUMY, an Amsterdam based design agency. Initially to serve research for a client project, they built a database of websites where you can customize and order products online. They added reviews, and the database became a site, offering some links to interesting sites for customization, like a custom sleeping bag, samurai sword, bicycle, skate board, scrabble board, watch, machine parts, perfume, lingerie, wallpaper or lego model. And soon, your built to order fire extinguisher, guitar, radio controlled car, protein shake or kanu.
Soon, visitors shall be able to also post reviews and upload images of the things they had made to order.
Sounds like a great idea -- and I am very happy about every new repository of things custom!